Raymond and The Survival of Man, and immediately sat down to write a flippant book the publication of which we hope he now regrets. Not only had he never investigated for himself, but he was also ignorant of the work of the S.P.R.

As to Mr Clodd, his book is better-informed, though frequently unfair. For instance, in his references to me he is very careful to avoid any consideration of the strong parts of my case. Like the famous theological professor, he looks the difficulties boldly in the face—not very boldly—and passes on, without speaking to them. He has obviously read fairly widely, but where he does criticise in detail, he always seizes on weak points and quietly ignores the strong ones. As to personal investigation he is almost entirely without experience. He says he attended a séance about fifty years ago, but has forgotten most of what happened! He says this, with a momentary lapse from his usual cleverness—for it gives away his case—in a letter to the April (1918) International Psychic Gazette. In other words, he poses as an authority on a branch of science of which he has no first-hand knowledge. He criticises and dismisses airily the opinions and investigations of those who have worked at the subject for ten, twenty, thirty, or forty years; for it is over forty years since Sir William Barrett brought his experiments in telepathy before the British Association. Mr Clodd is a Rationalist, and knows without investigation that these things cannot be. He is as à prioristic as a medieval Schoolman, in spite of his scientific pose. And his prejudices unfortunately prevent him from seeking and studying the facts which might lead him to other conclusions.

I have not said anything about the S.P.R. itself, but may here add a few remarks. Says its official leaflet: “The aim of the Society is to approach these various problems without prejudice or prepossession of any kind, and in the same spirit of exact and unimpassioned inquiry which has enabled Science to solve so many problems, once not less obscure nor less hotly debated.… Membership of the Society does not imply the acceptance of any particular explanation of the phenomena investigated, nor any belief as to the operation, in the physical world, of forces other than those recognised by Physical Science”. In other words, the Society has no creed, except that the subject is worth investigating.

The Society has well over 1,000 members, and is growing steadily. It includes many famous men in all walks of life, and indeed its membership list has been said to contain more well-known names than any other scientific society except the Royal Society itself. Among the Vice-presidents are the Right Honourables A. J. and G. W. Balfour, Sir William Barrett, Sir Oliver Lodge, the late Bishop Boyd-Carpenter and the late Sir William Crookes. The President for the current year is Lord Rayleigh, probably the greatest mathematical physicist now living.[5] The President of the Royal Society (Sir J. J. Thomson) is a member, also Professor Henri Bergson of Paris, Dr L. P. Jacks (editor of The Hibbert Journal) and innumerable other scientists and scholars whose names are known to everyone.

Finally let me assure you that the S.P.R. is so conservative and suspicious that admission is almost as difficult to obtain as membership of a high-class London club. It is extremely anxious to keep out cranks and emotional people of all sorts, and it requires any applicant to be vouched for as suitable by two existing members; and each application is separately considered by the Council. The result is a level-headed lot of members, and the maintenance of a sane and scientific attitude and management.

From the philosophic side it is sometimes urged that we cannot reason from the phenomenal to the noumenal, from the world of appearance to the world of reality; that consequently nothing happening in the material world can prove the existence of a spiritual one. But this is easily answered. We cheerfully agree, with Kant, that a spiritual world cannot be proved coercively and in such knock-down fashion that belief cannot be avoided. But it can be proved in the same way and to the same extent as many other things which we believe and find ourselves justified in believing. For instance, atoms and electrons and the Ether of Space are not phenomenal; no one has ever seen or heard or felt or smelt them; but we infer their real existence from the behaviour of the matter which does affect our senses. Again: we cannot prove to ourselves that other human beings exist, or even that an external world exists; my experience may be a huge subjective hallucination. If I were reading this paper I should not be able to prove to myself that any other mind was present. Looking around, I should receive certain impressions—sensations of sight—and I should call certain aggregations of these the physical bodies of beings like myself. From the similarity of their structure and behaviour to the structure and behaviour of my own body, I should infer that they have got minds somehow associated with them, as my mind is associated with my body. But you could not prove it to me. If you got angry with my obstinacy, and knocked me down, I should experience painful sensations, but the existence of a mind external to me—and an angry one—would still be a matter of inference only. But we find that the inference is justified. We find that it “works,” and social life is possible. For the purposes, then, both of science and of ordinary life, we do reason from phenomenon to noumenon, from appearance to reality, from attribute to substance; and our reasoning justifies itself. I affirm, therefore, that the kind of proof which we as psychical researchers put forward for the existence of and communication from discarnate minds, is philosophically the same kind as the proof we have of the existence of incarnate minds. If a short and clear exposition of the point is required, free from any psychical-research bias, I may refer inquirers to the chapter on the Psychological Theory of an External World in J. S. Mill’s Examination of Sir William Hamilton’s Philosophy. Our evidence may be insufficient to justify belief—in the opinion of many, it is—and I blame no one for disbelieving; but it is evidence. And if it sufficiently accumulates and improves in quality, it may amount to a degree of proof at least comparable with that concerning electrons, which are now accepted as real by all physicists.

One or two difficulties may here be briefly referred to:

1. The appearance in Mrs Piper’s script of such obvious dream-stuff as messages from Homer, Ulysses, and Telemachus! These are of course absurdities, and no psychical researcher regards them as anything else. But they are no more absurd than many of our own dreams, and we must remember that automatic writing comes from the dream-strata of the medium’s mind, these strata seeming to lie between our normal consciousness and the spiritual world. Consequently messages which really seem to come from beyond: i.e., which are evidential—are often mixed with subliminal matter from the medium’s mind. As a communicator once said: “The medium’s dreams get in my way.” All this has to be allowed for, but in good mediums there is not much of it. In my friend Wilkinson’s case there is none, for he can distinguish. In Mrs Piper’s case there is a little, but it does not invalidate the huge mass of real evidence that has come. And it at least testifies to her honesty, for no medium would